EVAL-AD5340DBZ User Guide UG-981
Rev. 0 | Page 3 of 13
EVALUATION BOARD HARDWARE
POWER SUPPLIES
The E VA L -AD5340DBZ evaluation board can be powered
either from the SDP-B port or externally by the J5 and J6
connectors, as described in Table 1.
The nanoDAC® EVAL -MBnanoDAC-SDZ motherboard
supports single- and dual-power supplies.
Both AGND and DGND inputs are provided on the board. The
AGND and DGND planes are connected at one location on the
EVAL-MBnanoDAC-SDZ. It is recommended that AGND and
DGND not be connected elsewhere in the system to avoid
ground loop problems.
All supplies are decoupled to ground with 10 µF tantalum and
0.1 µF ceramic capacitors.
Table 1. Power Supply Connectors
Connector No. Label Voltage
Analog positive power supply, V
DD
5.5 V single and dual supply
J5-2 AGND Analog ground
J5-3 VSS Analog negative power supply, VSS;
−5.5 V dual supply
J6-1 VLOGIC Digital supply from 1.8 V to VDD
LINK OPTIONS
Var ious link options are incorporated in the EVAL-MBnanoDAC-
SDZ and must be set for the required operating conditions
before using the board. Tabl e 2 describes the positions of the
links to control the evaluation board via the SDP-B board using
a PC and external power supplies. The functions of these link
options are described in detail in Table 4. The positions listed in
Table 2 and Table 4 match the evaluation board imprints (see
Figure 12).
Table 2. Link Options Setup for SDP-B Control (Default)
Link Number Position
REF1 2.5V
REF2 EXT
REF3 EXT
LK5 C
LK6 +3V3
LK7 B
DAUGHTER BOARD LINK OPTIONS
The AD5340 daughter board has a link option. The link
controls whether the reference input of the DAC is buffered or
unbuffered. Table 3 shows how the link is configured.
Table 3. Link Options for Daughter Board
Link Number Pin Position
LK1 BUF A (unbuffered, default)
B (buffered)
Table 4. Link Functions
Link Number Function
REF1, REF2, REF3, REF4These links select the reference source.
Position EXT selects an off board voltage reference via the appropriate EXT_REF connector.
Position VDD selects VDD as the reference source.
Position 4.096V selects the on-board 4.096 V reference as the reference source.
Position 2.5V selects the on-board 2.5 V reference as the reference source.
Position 5V selects the on-board 5 V reference as the reference source.
This link selects the positive DAC analog voltage source.
Position A selects the internal voltage source from the SDP-B board.
Position B selects the internal voltage source, 3.3 V from the ADP121 on the motherboard.
Position C selects the external supply voltage, VDD.
LK6 This link selects the VLOGIC voltage source.
Position +3V3 selects the digital voltage source from the SDP-B board (3.3 V).
Position VLOGIC selects an external digital supply voltage (VLOGIC).
LK7 This link selects the negative DAC analog voltage source.
Position A selects VSS.
Position B selects AGND.
